It could be interesting to have a list of Bitcoin days of observance. A bit like those "On This Day" segments where people reflect on history for 5 minutes.
Here's all the ones I could think of that could work.
3rd January 2009 - Genesis Block Day
11th January 2009 - Hal Finney downloads and installs bitcoin
https://twitter.com/halfin/status/111030298812th January 2009 - First bitcoin transaction (to Hal Finney)
27th January 2011 - Silk road opens.
Ross Ulbricht's first ever shill thread25th Feburary 2018 -
Lightning Pizza Day
1st April 2012 - p2sh soft fork
activates5th April 1975 -
Satoshi's Birthday7th May 2015 -
First JoinMarket coinjoin22nd May 2010 -
Pizza Day?? 2010 - First GPU mining
?? - First p2pool block
7th June 2012 - localbitcoins
opens4th July 2015 - BIP66 soft fork activates, results in
accidental chain split.
9th July 2016 - Second bitcoin
halvening28th July 2015 - Catastrophic near miss revealed.
Disclosure of consensus bug that was fixed by BIP66 soft fork.
1st August 2017 - "UASF day" BIP148 trigger date for activating UASF for segwit.
?? 2012 - Bitcoin appears on a TV show for the first time
31st October 2008 - Bitcoin whitepaper published
12th November 2017 - First bitcoin
block with miner fee income surpassing inflation subsidy.
See also.
28th November 2012 - First bitcoin
halvening12 December 2010 - Satoshi's
last public contact